Ready to wear

Wear less.
Track more.

Heart rate + sleep tracking
Free shipping
Ships ready to wear
Fits your Google Fitbit Air
No touchscreen
No notifications
Order PIV F-91 — $129.99
The Process
01
Select your model & pay

Choose the PIV F-91 or PIV CA-53W (calculator watch) and complete checkout. Takes 2 minutes.

02
We build & ship your watch

We source the watch, swap the strap to a custom nylon band with a Fitbit Air sensor bracket, and ship it to you within 7–10 business days. Free shipping.

03
Pop in your Fitbit Air sensor

When your watch arrives, remove the sensor pebble from your Google Fitbit Air band and slide it into the bracket. Done.

The Watches
PIV F-91 — Casio F-91W with Fitbit Air bracket
PIV F-91 with Fitbit Air sensor installed PIV F-91 worn on wrist
PIV F-91
$129.99

The classic Casio F-91W fitted with a custom nylon band and Fitbit Air sensor bracket. Iconic look, hidden tracking.

  • Casio F-91W base watch ✓
  • Custom nylon band + sensor bracket ✓
  • Ships ready to wear ✓
  • 7–10 day turnaround · Free shipping ✓
  • Fitbit Air sensor pebble not included ✗
Order PIV F-91 — $129.99
PIV CA-53W — Casio calculator watch with Fitbit Air bracket
PIV CA-53W with Fitbit Air sensor installed PIV CA-53W worn on wrist
PIV CA-53W (calculator watch)
$139.99

The Casio CA-53W calculator watch — same custom nylon band and Fitbit Air bracket. More character, same tracking.

  • Casio CA-53W base watch ✓
  • Custom nylon band + sensor bracket ✓
  • Ships ready to wear ✓
  • 7–10 day turnaround · Free shipping ✓
  • Fitbit Air sensor pebble not included ✗
Order PIV CA-53W — $139.99
Order

Select your model

Model PIV F-91
Ships in 7–10 business days
Shipping Free
Total $129.99

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FAQ
Q
Do I need a Google Fitbit Air?

Yes. The sensor pebble is not included with your PIV watch. You remove it from your existing Fitbit Air band and slide it into the bracket. It pops in and out easily, so you can swap back whenever you like.

Q
Does the Fitbit Air work the same way?

Yes, fully. Heart rate, sleep tracking, and steps all sync through the Google Fit app as normal. Nothing changes on the software side.

Q
What watch models do you offer?

Two models: the PIV F-91 ($129.99) based on the Casio F-91W, and the PIV CA-53W ($139.99) based on the Casio CA-53W calculator watch.

Q
How long does shipping take?

7 to 10 business days. We build each watch to order, so there is a short lead time before it ships. Shipping is free.

Q
Do you ship internationally?

Not at the moment. US orders only.

Q
What wrist size does it fit?

It fits all wrist sizes. The nylon band is adjustable and works on both smaller and larger wrists.

Q
Can I return it?

All sales are final. We are a small team building each watch to order, so we are unable to accept returns. If something arrives damaged or is not what you ordered, email hello@pivhq.com and we will make it right.